Leviticus 18:3, 24, 30

So do not act like the people in Egypt, where you used to live, or like the people of Canaan, where I am taking you. You must not imitate their way of life.

“Do not defile yourselves in any of these ways, for the people I am driving out before you have defiled themselves in all these ways.

So obey my instructions, and do not defile yourselves by committing any of these detestable practices that were committed by the people who lived in the land before you. I am the LORD your God.”